Oakmont Country Club is an 18-hole private golf course in Oakmont, Pennsylvania, built in 1903 and designed by Henry Fownes. It sits in the $$$$ (splurge) price range for golf in Pennsylvania. The course is open all year. Tee times can be booked 5 days in advance. Play is generally limited to members and their guests.
Details like fees and seasons change, so call the course before you head out.